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Kukkundūr, a small town nestled in the Udupi district of Karnataka, India, occupies a geographically interesting position. Located at coordinates 13.2404°N, 74.9541°E, the town sits amidst the undulating terrain of the Western Ghats foothills, approximately 15km inland from the Arabian Sea. The landscape is predominantly rural, characterised by lush coconut plantations, paddy fields, and areca nut groves. The elevation, though not dramatically high, contributes to localized weather patterns. Kukkundūr isn’t a major industrial hub; its economy is largely agrarian, with some small-scale businesses supporting the agricultural sector. This contrasts with larger industrial zones further north along the Karnataka coast. The urban-rural gradient is quite sharp, with Kukkundūr serving as a market town for surrounding villages. Proximity to the coast means the town experiences a strong maritime influence, including higher humidity and seasonal monsoon rains. However, this distance also buffers it somewhat from direct coastal pollution sources like port activity. Air quality is therefore heavily influenced by agricultural practices – burning of crop residue – and local vehicular emissions, rather than large-scale industrial output. The surrounding hills can trap pollutants during periods of calm weather, exacerbating localized air quality issues. Understanding this interplay of geography and activity is crucial for assessing and mitigating pollution in Kukkundūr.

Kukkundūr’s air quality follows a distinct seasonal pattern dictated by the monsoon and prevailing winds. The pre-monsoon months of March to May are typically the worst for air quality. Rising temperatures and dry conditions encourage agricultural burning to clear fields for the upcoming planting season, releasing significant particulate matter. Calm winds exacerbate the situation, allowing pollutants to accumulate. The arrival of the Southwest Monsoon in June brings a temporary respite. Heavy rainfall effectively washes away pollutants, improving air quality considerably. However, increased humidity can also foster mold growth, impacting respiratory health. Post-monsoon, from September to November, sees a gradual deterioration as agricultural activity resumes and winds become lighter. December to February offers the most favourable conditions, with cooler temperatures, occasional rainfall, and stronger winds dispersing pollutants. During these months, outdoor activity is generally safer. Sensitive groups – children, the elderly, and those with pre-existing respiratory conditions – should limit exposure during the pre-monsoon period and monitor conditions closely. Temperature inversions, common during cooler months, can trap pollutants near ground level, even during otherwise favourable conditions. Fog, prevalent in the cooler season, can also contribute to increased particulate matter concentrations.